A Swimmer is a type of Pokémon Trainer that first debuted in the Generation I games. Originally, the only Swimmers to appear in-game were male—Swimmer ♂ (Japanese: かいパンやろうSwimsuit Guy)—but in Generation II, female swimmers, Swimmer ♀ (Japanese: ビキニのおねえさんBikini Lady) were introduced. Swimmers are found in the sea, usually just off the coast, and in some Gyms. From Generations II through V, they were formatted as Swimmer♂ and Swimmer♀.

Pokémon

Slowpoke

Akinori was originally going to use Slowpoke for a surfing contest but broke his leg and lent it to Yellow instead. After the contest got interrupted and before the battle with Lance, Yellow returned Slowpoke to Akinori.

A Feebas-hunting Swimmer appears in Not So Fetching Feebas, being the Trainer class's most prominent appearance. When Ruby accidentally crashes into his trap laid for the Feebas, he forces Ruby into helping him with his hunt. After Ruby finds a Feebas and lets it go, he tells Ruby he is looking for a Feebas to sell to a man who is willing to pay a load of money for the rare fish. After Ruby decides to keep the Feebas for a while, the Swimmer decides to find Ruby so he can breed a Feebas of his own.

Trivia

For the first time in Generation V, male Swimmers are depicted with swim shorts in a Japanese release. In previous games, they were depicted wearing swim briefs, which would sometimes be changed into swim shorts for international releases.